<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class AdminIdentity extends CUserIdentity
{
	const ERROR_STATE_INVALID=11;
	
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
		$authModel = $this->getAuthModel()->loadByAccount($this->username);
		if( !$authModel || $authModel->count() == 0) {
			$this->errorCode=self::ERROR_USERNAME_INVALID;
			
		} else if( $authModel && $authModel->getAttribute('password') !== md5($this->password) ) {
			$this->errorCode=self::ERROR_PASSWORD_INVALID;
			
		} else if( $authModel && $authModel->getAttribute('status')!=1) {
			$this->errorCode=self::ERROR_STATE_INVALID;
			
		} else {
			$this->errorCode=self::ERROR_NONE;
		}
		return !$this->errorCode;
	}
	
	protected function getAuthModel()
	{
		/* @var $model CModel */
		$model=AdminhtmlAdmin::model();
		if($model===null)
			throw new CHttpException(404,'Error occur when init auth model.');
		return $model;
	}
}